Genesis 16:3

New English Translation

³So after Abram had lived^[a] in Canaan for ten years, Sarai, Abram’s wife, gave Hagar, her Egyptian servant,^[b] to her husband to be his wife.^[c]

Genesis 16:3 tn Heb “at the end of ten years, to live, Abram.” The prepositional phrase introduces the temporal clause, the infinitive construct serves as the verb, and the name “Abram” is the subject.
Genesis 16:3 tn Heb “the Egyptian, her female servant.”
Genesis 16:3 sn To be his wife. Hagar became a slave wife, not on equal standing with Sarai. However, if Hagar produced the heir, she would be the primary wife in the eyes of society. When this eventually happened, Hagar become insolent, prompting Sarai’s anger.

Genesis 25:6

New English Translation

⁶But while he was still alive, Abraham gave gifts to the sons of his concubines^[a] and sent them off to the east, away from his son Isaac.^[b]

Genesis 25:6 tn Heb “the sons of the concubines who [belonged] to Abraham.”
Genesis 25:6 tn Heb “And he sent them away from upon Isaac his son, while he was still living, eastward to the land of the east.”

³²The sons to whom Keturah, Abraham’s concubine,^[a] gave birth: Zimran, Jokshan, Medan, Midian, Ishbak, Shuah.

The sons of Jokshan: Sheba and Dedan.

1 Chronicles 1:32 sn A concubine was a slave woman in ancient Near Eastern societies who was the legal property of her master, but who could have legitimate sexual relations with her master. A concubine’s status was more elevated than a mere servant, but she was not free and did not have the legal rights of a free wife. The children of a concubine could, in some instances, become equal heirs with the children of the free wife. After the period of the Judges concubines may have become more of a royal prerogative (2 Sam 21:10-14; 1 Kgs 11:3).

New English Translation (NET)